A 28-year-old woman with a history of three dilation and curettage procedures for postpartum hemorrhage presents with secondary amenorrhea for 8 months. Her FSH and LH levels are normal, and serum estradiol is low. Pelvic ultrasound shows a thin endometrium. What is the most appropriate next step in management?

Explanation

## Clinical Diagnosis: Asherman Syndrome This patient has classic features of **Asherman syndrome** (intrauterine adhesions): - **Multiple curettage procedures** → mechanical trauma to endometrium - **Secondary amenorrhea** → loss of menstruation after normal cycles - **Normal FSH/LH** → intact hypothalamic-pituitary-ovarian axis - **Low estradiol** → thin, non-functional endometrium - **Thin endometrium on ultrasound** → hallmark finding ## Diagnostic and Management Pathway ```mermaid flowchart TD A[Secondary amenorrhea + History of curettage]:::outcome --> B{FSH/LH normal?}:::decision B -->|Yes| C{Estradiol level?}:::decision C -->|Low| D[Suspect endometrial pathology]:::outcome C -->|Normal| E[Progestin challenge test]:::action D --> F[Ultrasound: thin endometrium?]:::decision F -->|Yes| G[Diagnostic hysteroscopy]:::action F -->|No| H[Consider other causes]:::action G --> I[Visualize adhesions, assess severity]:::outcome I --> J[Hysteroscopic adhesiolysis]:::action E -->|Withdrawal bleed| K[Anovulation - Ovulation induction]:::action E -->|No bleed| L[Endometrial pathology - Hysteroscopy]:::action ``` ## Why Diagnostic Hysteroscopy? **Key Point:** Diagnostic hysteroscopy is the gold standard for diagnosing intrauterine adhesions and allows simultaneous therapeutic intervention (adhesiolysis). **High-Yield:** In a patient with: - Normal gonadotropins (rules out ovarian failure) - Low estradiol with thin endometrium (suggests endometrial pathology) - History of uterine instrumentation (risk factor for adhesions) → **Hysteroscopy is both diagnostic and therapeutic**, making it the most appropriate next step. ## Why Not the Other Options? **Clinical Pearl:** The progestin challenge test would likely be **negative** in Asherman syndrome (no withdrawal bleed due to thin, non-responsive endometrium), but it does not provide a diagnosis or guide treatment. Hysteroscopy directly visualizes the problem and allows treatment. **Warning:** Estrogen replacement without addressing the underlying adhesions is ineffective and delays appropriate management. Infertility counseling is premature before attempting endometrial restoration. **Mnemonic:** **ASHERMAN** — Amenorrhea, Scarring/Synechiae, History of curettage, Estradiol low, Reproductive loss, Minimal endometrium, Adhesiolysis needed, Normal FSH.